Abstract
A series of manganese oxide catalysts supported on oxidized multi-walled carbon nanotubes for low temperature selective catalytic reduction of nitrogen oxides (NOx) with NH3 in the presence of excess O2 was prepared by a simple impregnation method. These catalysts were characterized by N2 adsorption, TEM, XRD and H2-TPR methods. The effects of reaction temperature, MnOx loading, and calcination temperature were investigated. Under the reaction conditions of 483 K, 1 bar, NO = NH3 = 900 ppm, 5 vol% O2, GHSV = 30,000 h−1, and 12 wt% MnOx, NOx conversion and N2 selectivity of 91 and 99 %, respectively, were obtained. The LTSCR activity was suppressed in the presence of 100 ppm SO2 and 2.5 vol% H2O at reaction temperatures below 573 K, but it was reversible to its initial level after heating and sweeping the catalyst at 573 K for 2 h in Helium.
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The authors gratefully acknowledge the support of the Research Institute of the Petroleum Industry (RIPI) of Iran for this work.
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Pourkhalil, M., Zarringhalam Moghaddam, A., Rashidi, A. et al. Synthesis of MnOx/Oxidized-MWNTs for Abatement of Nitrogen Oxides. Catal Lett 143, 184–192 (2013). https://doi.org/10.1007/s10562-012-0938-6
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DOI: https://doi.org/10.1007/s10562-012-0938-6